Sphere Calculator
Enter the radius to find a sphere's volume and surface area.
Reviewed by the WorldCalcs team · Methodology · Last reviewed: June 2026
Volume
113.0973355
V = (4/3)πr³
Surface area
113.0973355
A = 4πr²
What is a sphere?
A sphere is a perfectly round solid where every point on the surface is the same distance — the radius — from the centre, like a ball. The radius is the only measurement you need to find both its volume (how much space it fills) and its surface area (the area of its outside).
The sphere formulas
With radius r: the volume is V = (4/3)πr³ and the surface area is A = 4πr². Both depend only on the radius, so doubling the radius multiplies the volume by eight and the surface area by four.
Example
A sphere with radius 3 has a volume of (4/3) × π × 3³ ≈ 113.10 and a surface area of 4 × π × 3² ≈ 113.10. (The two happen to match at radius 3.)
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Results are estimates and may contain errors — for general information only, not professional advice. Always verify before relying on them. Disclaimer
How to use
Type a positive radius. The calculator returns the volume ((4/3)πr³) and surface area (4πr²) instantly.
Values are rounded to about 6 significant digits using the standard constant π ≈ 3.14159.
Frequently asked questions
How do you find the volume of a sphere?+
What is the surface area of a sphere?+
What happens if you double the radius?+
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